linux-ext4 - Re: Atomic non-durable file write API

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <AANLkTikhDgJNny74nyBugg9cUmxC9j8Eo8YY4Fr3fm=5@mail.gmail.com>
Date:	Thu, 16 Dec 2010 13:22:20 +0100
From:	Olaf van der Spek <olafvdspek@...il.com>
To:	linux-fsdevel@...r.kernel.org, linux-ext4@...r.kernel.org
Subject: Re: Atomic non-durable file write API

On Thu, Dec 9, 2010 at 1:03 PM, Olaf van der Spek <olafvdspek@...il.com> wrote:
> Hi,
>
> Since the introduction of ext4, some apps/users have had issues with
> file corruption after a system crash. It's not a bug in the FS AFAIK
> and it's not exclusive to ext4.
> Writing a temp file, fsync, rename is often proposed. However, the
> durable aspect of fsync isn't always required and this way has other
> issues.
> What is the recommended way for atomic non-durable (complete) file writes?
>
> I'm also wondering why FSs commit after open/truncate but before
> write/close. AFAIK this isn't necessary and thus suboptimal.

Somebody?

Olaf
--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html